Mining group Xstrata Plc (XTA.L) said it planned a two-for-one rights issue to raise about $5.9 billion to repay debt and said its 2008 earnings per share fell 13 percent.

Xstrata, the world's fifth-biggest diversified mining group by market value, said it would issue 1.96 billion new shares at 2.10 pounds a share.

Following the fund raising, its net debt would fall to around $12.6 billion, with gearing less than 30 percent, it added.

Xstrata also said it planned to buy the Prodeco thermal coal assets from its biggest shareholder, Glencore, for $2 billion. (Reporting by Eric Onstad; Editing by David Holmes)

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